为了改善304不锈钢工件的高温耐磨性能，利用CO2激光器在其表面熔覆了Ni基高温合金层。研究了熔覆层的物相组成、显微组织、成分分布，测试了其显微硬度、高温耐磨性能等，并与基材进行了对比。结果表明：Ni基合金熔覆层的组织从熔池底部到表层为胞状晶一柱状枝晶一树枝晶；熔覆层的主要组成相是Ni3Cr2，NbC，Mo2C与Cr23C6；Ni基合金粉末中添加难熔元素Cr，Mo，Nb等对熔覆层的组织起到了固溶强化、硬质相强化和弥散强化作用；熔覆层的平均显微硬度达到了405HV，高温耐磨性能是基体的2倍多。
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